Ashcroft 1133 User manual

Installation Instructions for
ASHCROFT®Model 1133 & 1143
Differential Pressure Gauge/Switch
© Ashcroft Inc. 2019, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. 1133-1143_i&m_RevA_Ltr_(008-10086)_05-15-19
For proper operation of your gauge, please read all
instructions carefully before installing.
CAUTION: Do not exceed maximum operating pressure given
on the gauge label. Check fluid compatibility with wetted parts
before use.
LIABILITY
The liability of the manufacturer is null and void in case
of damage caused by incorrect use, failure to comply
with manufacturer’s instructions, failure to comply with
local accident prevention safety laws and the handling by
untrained personnel.
OPERATING PRINCIPLE
High and Low pressures are separated by a sensor
assembly consisting of a magnet, diaphragm and a range
spring. The difference in pressure causes the sensor
assembly to move in proportion to the change against a
range spring.
A rotary magnet, located in a separate body compartment
and isolated from the acting pressures is rotated by a
magnetic coupling following the linear movement of the
sensor assembly. A pointer attached to the rotary magnet
indicates differential pressure on the dial.
SWITCH: Reed switches (optional) are located adjacent to
the pressure chamber and are activated by the magnetic
field of the sensor assembly.
Note: The gauges are calibrated to give ±2% full scale
accuracy on ascending readings.
INSTALLATION
For better performance the gauge should be mounted
horizontally with the dial vertical. Two mounting holes
should be used for mounting (when applicable). Select
instrument location where it is not subjected to heavy
vibration or shock. Depressurize the system and connect
the high and low pressure lines of your system to the “High”
and “Low”ports of the gauge, respectively.
It is recommended for tapered threads to use thread
sealant tape and for parallel threads it is recommended
to use “O” rings with male connectors to avoid excessive
tightening and to prevent leakage. The gauge is now
ready for operation. Apply “High” and “Low”pressures
simultaneously, to avoid damage to the internal parts.
Models 1133 & 1143 consists of a large convoluted
diaphragm design for low differential pressure. It can
withstand maximum operating pressure up to 500 psi. If
pressure exceeds the rated maximum pressure, damage
will occur.
PRECAUTIONS
Do not connect “High” and “Low” ports incorrectly. Do
not subject the gauge to excessive vibration. The gauge
is never to be used in an area where a magnetic field is
present as it may show the wrong readings.
As the gauge works on a magnetic coupling principle, use
only non-magnetic fittings, parts, etc. in areas closer than
2˝ on all sides, otherwise calibration will be affected. Panel
mounted gauges should be installed in non-ferrous panel
material. However, gauges with 2˝ and 2.5˝ dials, mounted in
steel panels, may require pointer adjustment. This is done
by the manufacturer, upon request.
Do not try to open the back housing of the gauge for any
reason as calibration will be affected.
SWITCH SETTING
Please follow these instructions when your differential
pressure gauges are supplied with a switch. The switches
are normally factory set to save time the customer time.
However, they are field adjustable.
CAUTION: Supply voltage should not exceed switch rating.
For higher supply, adding a relay is recommended.
SWITCH ADJUSTMENT
The following procedure must be done by putting the
gauge on a test bench or while in actual service. The switch
adjustment screw is located on the plastic cover. Rotate
the screw counter clockwise to increase the setpoint and
clockwise to decrease the setpoint. One or two trials may
be necessary to attain the exact setpoint.
ROTARY MAGNET
MAGNET
POINTER HIGH
0
10
20
30
40
DIAPHRAGM
LOW
50
REED SWITCH
Model 1133/1143
Large Convoluted Diaphragm
View from high pressure side
Increase set point
counter clockwise

Installation Instructions for
ASHCROFT®Model 1133 & 1143
Differential Pressure Gauge/Switch
© Ashcroft Inc. 2019, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. 1133-1143_i&m_RevA_Ltr_(008-10086)_05-15-19
Load
NC NO
1
3
2
E
Load
L
(+)
N
(-)
N
(-)
R
RB B
Switch #1 Switch #2
Load
L
(+)
N
(-)
RB
Switch #1
6
6
5
5
4
4
3
3
2
2
1
1
6
6
5
5
4
4
3
3
2
2
1
1
N
(-)
L
(+)
N
(-)
Load Load
NC
NO
B
RY
6
6
5
5
4
4
3
3
2
2
1
1
N
(-)
L
(+)
N
(-)
N
(-)
Load Load Load Load
N
(-)
NC
NC
NO
NO
B
RYYB
6
6
5
5
4
4
3
3
2
2
1
1
Lor (+) Lor (+)
Lor (+)
Load
Nor (-) Nor (-)
Nor (-)
Nor (-)
Nor (-)
1
3
2
E
B
R
E
1
3
2SPST
Switch
Load for
Load for
Switch #1
3
2
E
1
3
1
E
R
B
2
B
Y
R
3
12
EB
SPDT
Switch
Switch #1 Switch #1 Switch #2
Switch #2
Switch #1 Switch #2
View of plug after removing the socket View of plug after removing the socket
Load
NC NO
1
3
2
E
Load
L
(+)
N
(-)
N
(-)
R
RB B
Switch #1 Switch #2
Load
L
(+)
N
(-)
RB
Switch #1
6
6
5
5
4
4
3
3
2
2
1
1
6
6
5
5
4
4
3
3
2
2
1
1
N
(-)
L
(+)
N
(-)
Load Load
NC
NO
B
RY
6
6
5
5
4
4
3
3
2
2
1
1
N
(-)
L
(+)
N
(-)
N
(-)
Load Load Load Load
N
(-)
NC
NC
NO
NO
B
RYYB
6
6
5
5
4
4
3
3
2
2
1
1
Lor (+) Lor (+)
Lor (+)
Load
Nor (-) Nor (-)
Nor (-)
Nor (-)
Nor (-)
1
3
2
E
B
R
E
1
3
2SPST
Switch
Load for
Load for
Switch #1
3
2
E
1
3
1
E
R
B
2
B
Y
R
3
12
EB
SPDT
Switch
Switch #1 Switch #1 Switch #2
Switch #2
Switch #1 Switch #2
SPST SWITCH
Specifications
Contact Rating : 10 VA ac (rms) or dc (max)
Switching Current : 0.5 Amp ac (rms) or dc (max)
Switch Voltage : 100 Vac/Vdc (max)
SPDT SWITCH
Specifications
Contact Rating : 3 VA ac (rms) or dc (max)
Switching Current : 0.3 Amp ac (rms) or dc (max)
Switch Voltage : 30 Vac/Vdc (max)
ONE SPST SWITCH TWO SPST SWITCHES
Reed Switches and
DIN Plug Connection
View of socket for supply connections
Reed Switches and
DIN Plug Connection
View of socket for supply connections
Reed Switches and
DIN Plug Connection
View of socket for supply connections
ONE SPDT SWITCH
View of plug after removing the socket
R = Red; B = Black; Y = Yellow; L = Live or + Supply; N = Neutral or – Supply. *Body to be suitably grounded while using gauge + switch and only switch.